1. Yes, but in and of itself not fatal so long as your GMAT scores are strong (700+).
2. Yes, in fact it will be a far bigger hurdle than your low GPA. B-schools are generally wary of taking on someone who already has an MBA - and if your MBA is from a US school, your chances of getting another MBA from a US school are pretty much slim to none.
3. Yes, you need more than just 1 year of experience. 3+ years is more in line. Keep in mind that you're competing with other MBA students for jobs, many of whom will have solid years of work experience. An MBA is a complement, not a substitute for prior work experience.
4. Depends on the schools. If you're targeting top 16 schools, it can be important. If you're targeting schools outside of that, it's less important so long as your GMAT is in range and the rest of your application (essays, rec letters, resume, interview) is well executed.
5. See 1 - 4. Your chances of getting into an MBA program are slim, because there's too many concerns you will have to address.
6. That is something you need to figure out. You want to pursue things that you have a genuine interest in - stuff that you would be doing irrespective of your b-school plans. It's not about window dressing and resume building - it's about getting involved because you want to.
8. See 1 - 7. You'll have a hard enough time getting in, let alone trying to secure scholarships.
I recommend that you forget about getting a second MBA. Focus on making the most of your work experience now and over time.
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